Lennar Homes has many great options available when purchasing a new home. Everything is customizable so a storm shelter is definitely an option for you.
The paleo's had temporary homes. They were always traveling. When they constantly was in migration the paleo dug pits for there homes. They would dig pits to keep warm.
Panda bears in general don't live in any sort of shelter. However, I'm pretty sure that they give birth in dens, where cubs stay until they can see and walk enough to follow their mother.